Not every action can be done when you have limited time and energy. I'm a software developer by trade. Some of my most atomic action on a software development project is to code a specific module or class. There's thinking and problem solving involved in that action that requires intense concentration and no interruption. I can't do it when I'm punch-drunk tired.

The main idea is that you want your next actions to each be atomic as possible so that you don't feel resistance when you look at them. Sometimes, however, the most atomic of actions can still require six hours of uninterrupted time and an mental or physical energy level of at least 7 out of 10. It's okay for an action like that to sit on your lists for weeks at a time provided that the reason that you've not done the action is that you've not been able to configure your life to make that happen.

The weekly review is a time to reflect on unfinished actions so that you can ask yourself why it's not done and if you should even be doing it right now.